Copper Canyon Ultramarathon 2012

It’s said to be one of the worlds most spectacular ultramarathons. The Copper Canyon Ultramarathon, also called Caballo Blanco Ultramarathon, is held every February in Urique, Mexico. About 70 foreign ultra-marathoners compete against Tarahumaras in a 80 km long run.

See the short-story about the 80 km long Cabballo Blanco Copper Canyon Ultramarathon, and one of Micah Trues, "Caballo Blanco", last interviews.
This is the place the book "Born to Run", by Christopher Mcdougall, is describing. A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen